6 Suggested Answers

Hi,
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If you are talking about the cruise control, there is a cable that comes off of the throttle and into a mechanism on the firewall. It vaguely, somewhat, not really looks like a mushroom. This is the cruise control unit. There will be one or two vacuum lines in it. Consult your vacuum diagram under the hood to find out where they are supposed to go.

Hi Tnmcat,
Check the available vacuum at a manifold port with the engine idling. It should be 17-21 inches of vacuum. If it is to low,it will give you multiple vacuum concerns. Also, I don't think this unit had a vacuum advance. This timing and advance should be controlled by the on board computer (or PCM). If you turn the distributor it will not change the timing but it will throw the fuel system out of synchronization. Here is the vacuum diagram I have. If you need anything else,drop me a line. Thanks,Chuck

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360 cu in (5.9 L) LA V8
or the 5.9 Cummins.? is really 5.88L
here is that generation line up.
3.9 L MagnumV6
5.2 L MagnumV8
5.9 L MagnumV8
5.9 L CumminsTurbo-dieselI6
8.0 L MagnumV10
so 5.9 dont help me...see?
what is the question the above is a statement of fact.
do tell?
did you leave out , what is it? or ????
are you just curious?
if in the USA> are you? open hood, look up.see EPA vacuum map?
bingo ? (ours does !)
if no bingo, it's in the FSM for your country (only) book, dealer sells book..
and at alldata.com
did it fall off?
vacuum maps very by
country (smog laws) and engine.
and by options.

Hi Tnmcat,
Check the available vacuum at a manifold port with the engine idling. It should be 17-21 inches of vacuum. If it is to low,it will give you multiple vacuum concerns. Also, I don't think this unit had a vacuum advance. This timing and advance should be controlled by the on board computer (or PCM). If you turn the distributor it will not change the timing but it will throw the fuel system out of synchronization. Here is the vacuum diagram I have. If you need anything else,drop me a line. Thanks,Chuck

If you are talking about the cruise control, there is a cable that comes off of the throttle and into a mechanism on the firewall. It vaguely, somewhat, not really looks like a mushroom. This is the cruise control unit. There will be one or two vacuum lines in it. Consult your vacuum diagram under the hood to find out where they are supposed to go.